#include <stdio.h>
#include <unistd.h>
#include <sys/types.h>

int main()
{
	pid_t ppid = getppid();
	pid_t id = getpid();
	while(1)
	{
		printf("hello ltw!, I am a process,pid: %d, ppid: %d\n",id,ppid);
		sleep(1);
	}
	return 0;
}
